Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 9 - Section 9.5 - Parametric Equations - Exercise Set - Page 1022: 95


a. $ -2i-2j$ b. $ 8i-13j$ c. $ -23$ d. $ 29$

Work Step by Step

Given $\vec v=2i-5j$ and $\vec w=-4i+3j$, we have a. $\vec v + \vec w =(2-4)i + (-5+3)j=-2i-2j$ b. $2\vec v - \vec w =(4+4)i + (-10-3)j=8i-13j$ c. $\vec v\cdot \vec w =(2)(-4)+(-5)(3)=-23$ d. $\vec v\cdot \vec v =(2)(2)+(-5)(-5)=29$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.